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@ 2014-05-19T05:29:39Z

<?php $time = mktime(0, 0, 0, 1, 1);
for ($i = 0; $i < 86400; $i += 1800) {  // 1800 = half hour, 86400 = one day
    printf('<option value="%1$s-%2$s">%1$s-%2$s</option>',
           date('g:i', $time + $i), date('g:i a', $time + $i + 1800));
}
?>

Output
Performance
VLD
References
Branches

mktime: documentation ( source)
date: documentation ( source)
printf: documentation ( source)

preferences:dark modelive preview

36.35 ms | 402 KiB | 5 Q